Hertel 67230300 Cobalt Drill Bit No 13 135 Split Point

Product Description

The HERTEL 67230300 is a short-series threaded shank drill bit designed for drilling into high-tensile strength metals. It is made from cobalt steel and finished with an oxide coating for added surface hardness and heat resistance. The bit measures 0.1850 inches in diameter, corresponding to wire size No. 13, with a 135-degree split point that reduces walking and cutting pressure at the start of a hole. Overall length is 1.25 inches with a 0.5625-inch spiral flute. The 1/4-28 threaded square shank is designed to seat securely in compatible quick-change or threaded chuck systems. This bit is appropriate for aerospace, fabrication, and maintenance technicians working with hard alloys and high-strength fastener materials.

This drill bit is suited for use in tight-clearance or short-reach drilling applications where a standard-length bit would be impractical. The short-series form factor and 1/4-28 threaded shank make it compatible with quick-change drilling systems common in sheet metal and structural work on high-tensile alloys, stainless steel, and similar hard materials. It meets NAS 965 Type D specification, making it appropriate for aerospace-grade work where dimensional and material standards must be maintained. Right-hand cutting direction with a regular spiral flute pattern ensures consistent chip evacuation.

Key Features

• Cobalt construction with oxide coating for heat and wear resistance in high-tensile metals
• 135-degree split point reduces thrust force and prevents bit walking on hard surfaces
• Web-thinned tapered web for reduced cutting resistance
• 1/4-28 threaded square shank for secure fit in quick-change and threaded chuck systems
• Short-series overall length of 1.25 inches for confined-space access
• Meets NAS 965 Type D specification for aerospace and precision applications

Compatibility

Designed for use with quick-change or threaded chuck drilling systems that accept a 1/4-28 threaded square shank. Intended for drilling high-tensile strength metals per NAS 965 Type D specification requirements.

Installation Notes

Installation and use should be performed by qualified machinists, tool and die technicians, or maintenance professionals familiar with metal cutting operations. Ensure the threaded shank is fully engaged and seated in the chuck before operation. Use appropriate cutting fluid or coolant when drilling hard alloys to extend bit life and maintain hole quality. Inspect the cutting edges before each use and replace if chipping or wear is observed.